This is the 12484th most frequent Russian word.
климатом
"Климатом" means "climate" in English.
Here, 'климату' is in the dative case used to indicate adaptation or habituation to something.
Я привык к суровому климату Сибири.
I have become accustomed to the harsh climate of Siberia.
In this sentence, 'климата' is in the genitive case to describe change related to it.
Изменения климата влияют на жизнь животных.
Climate change affects the lives of animals.
Here, 'климатом' is in the instrumental case, used to highlight the characteristic of the area.